QB#51 - Creature spawning intelligent placement

Creature’s can currently spawn anywhere within their given rectangle. This includes levels that aren’t necessarily possible to get to or from (say for example, a table). This means the creatures are currently taking up a useless slot, limiting the number of creatures people can fight, and using up unnecessary thinks, trying to find a way out.

Placement should be more intelligent, perhaps opting for something within a few height levels of norm, or of the spawns center.